/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | foam-extend: Open Source CFD
   \\    /   O peration     | Version:     4.1
    \\  /    A nd           | Web:         http://www.foam-extend.org
     \\/     M anipulation  | For copyright notice see file Copyright
-------------------------------------------------------------------------------
License
	This file is part of foam-extend.

	foam-extend is free software: you can redistribute it and/or modify it
	under the terms of the GNU General Public License as published by the
	Free Software Foundation, either version 3 of the License, or (at your
	option) any later version.

	foam-extend is distributed in the hope that it will be useful, but
	WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
	General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with foam-extend.  If not, see <http://www.gnu.org/licenses/>.

Namespace
	Foam::PstreamGlobals

Description
	Global functions and variables for working with parallel streams,
	but principally for gamma/mpi

SourceFiles
	PstreamGlobals.C

\*---------------------------------------------------------------------------*/

#ifndef PstreamGlobals_H
#define PstreamGlobals_H

#include "mpi.h"

#include "DynamicList.H"

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

namespace Foam
{


namespace PstreamGlobals
{

extern DynamicList<MPI_Request> outstandingRequests_;

extern int nTags_;

extern DynamicList<int> freedTags_;


// Current communicators. First element will be MPI_COMM_WORLD
extern DynamicList<MPI_Comm> MPICommunicators_;
extern DynamicList<MPI_Group> MPIGroups_;

void checkCommunicator(const label, const label procNo);

};


// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

} // End namespace Foam

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

#endif

// ************************************************************************* //
